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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2020
Aug. 28, 2020
Jun. 25, 2020
Jun. 12, 2020
May 27, 2020
Mar. 13, 2020
Feb. 14, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Apr. 17, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares authorized (in shares)                       370,000
Number of shares available for grant (in shares)               174,393   174,393    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                   5,000 15,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value                   $ 4.00 $ 6.88  
Treasury Stock, Shares, Acquired               12,238 9,560 323,660 14,097  
Treasury Stock Acquired, Average Cost Per Share               $ 17.06 $ 16.07 $ 16.92 $ 16.38  
Purchased shares     294,117                  
Dividend payable per share (in dollars per share)   $ 0.16     $ 0.125   $ 0.125          
Dividends paid $ 300     $ 300   $ 300            
Minimum                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Percentages of stock option ownership considered for higher exercise price of option                   10.00%    
Vesting period of stock options                   2 years    
Maximum                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Option exercise price as percentages of closing exercise price of stock for specific shareholders                   110.00%    
Vesting period of stock options                   3 years    
Stock Options                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Expiration period of stock option plan                   10 years    
Incentive Stock Options                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Expiration period of stock option plan                   5 years